Laura Abbott c2368fb3e6 gpu: ion: Ensure zeroed memory gets written to RAM ...

When zeroing buffers, we need to make sure the zeroed data actually
gets written back to RAM. Otherwise, it may be possible for a buffer
to be reallocated with data still needing to be written back to RAM.
This may lead to corruption from userspace allocators expecting zero'd
buffers and a potential leak of kernel data to user space. Considering
the mapping is short lived and we need to write back the data, use a
writecombine mapping to write the data directly to ram and avoid the
cost of flushing the cache. If the mapping is cached, invalidate the
kernel side mappings as well.

Change-Id: I26a49908bde411469f3b8f143a1581fb4e2c3b56
CRs-Fixed: 520044
Signed-off-by: Laura Abbott <lauraa@codeaurora.org>

2013-08-20 17:43:10 -07:00

..

msm

Merge "msm: Add NULL pointer check before ion cache operation"

2013-07-12 11:53:10 -07:00

tegra

…

ion_carveout_heap.c

gpu: ion: Fixup merge conflicts and old code

2013-04-26 11:19:11 -07:00

ion_chunk_heap.c

gpu: ion: Make ion_free asynchronous

2013-04-16 11:11:54 -07:00

ion_cma_heap.c

gpu: ion: Explictly mark DMA allocations as GFP_KERNEL

2013-06-19 10:07:21 -07:00

ion_cma_secure_heap.c

gpu: ion: Explictly mark DMA allocations as GFP_KERNEL

2013-06-19 10:07:21 -07:00

ion_cp_heap.c

msm: remove fmem support

2013-06-20 10:46:21 -07:00

ion_heap.c

gpu: ion: Refactor the code to zero buffers

2013-04-16 11:11:41 -07:00

ion_iommu_heap.c

gpu: ion: Ensure zeroed memory gets written to RAM

2013-08-20 17:43:10 -07:00

ion_page_pool.c

gpu: ion: Set the dma address for pages from the page pool

2013-06-05 12:54:24 -07:00

ion_priv.h

gpu: ion: Fixup merge conflicts and old code

2013-04-26 11:19:11 -07:00

ion_removed_heap.c

gpu: ion: Pull caching code into msm specific files

2013-04-12 13:15:47 -07:00

ion_system_heap.c

ion: Add null-pointer check to info structure

2013-06-26 16:07:30 -07:00

ion_system_mapper.c

…

ion.c

gpu: ion: Attempt heaps in the order given

2013-06-20 11:09:44 -07:00

Kconfig

gpu: ion: Fixup merge conflicts and old code

2013-04-26 11:19:11 -07:00

Makefile

gpu: ion: Move msm heaps in makefile to msm definitions

2013-04-30 13:28:33 -07:00

msm_ion_priv.h

gpu: ion: Move iommu mapping and unmapping out of Ion

2013-04-12 13:15:43 -07:00